diff --git a/tests/xharness/ProjectFileExtensions.cs b/tests/xharness/ProjectFileExtensions.cs
index bf71473c3f..09399d6f7c 100644
--- a/tests/xharness/ProjectFileExtensions.cs
+++ b/tests/xharness/ProjectFileExtensions.cs
@@ -733,6 +733,7 @@ namespace xharness
 			{
 				new string [] { "None", "Include" },
 				new string [] { "Compile", "Include" },
+				new string [] { "Compile", "Exclude" },
 				new string [] { "ProjectReference", "Include" },
 				new string [] { "InterfaceDefinition", "Include" },
 				new string [] { "BundleResource", "Include" },